Gums, the father of one of my buddies when I was in college was a BUFF pilot during Linebacker II (I think is was the 12 days of Christmas, 40 plus year memory is a bit fuzzy). On their first mission he figured it would be, ah, interesting since the NV had been preparing their SAM reception unimpeded for some time, so he brought a small cassette tape recorder along and turned it on during the bomb run (apparently a pretty big no-no).
He played that tape for a group of us Aero Engineering students once - pretty sobering stuff. IIRC they lost 3 Buffs from his flight on that mission
According to him, the planners did some pretty dumb things on that mission with countermeasures but I won't elaborate.
One thing that really stuck with me - after they'd turned for home and were out of harm's way, someone said 'I sure hope we don't have to go through that again'...